Polyurethane Laminating Adhesive Containing Filler

摘要

The present invention relates to a polyurethane adhesive, in particular for laminating multilayer films, wherein the PU adhesive contains—based on the total weight of the adhesive—5 to 50 wt %, preferably 10 to 40 wt %, particularly preferably 20 to 30 wt % of at least one solid particulate filler, wherein at least 90% of the filler particles of the at least one filler has a particle size of 4 μm or less, and the at least one filler has a Mohs hardness of 3 or less. The present invention also relates to the use of the adhesive for adhering films, to methods for producing composite films, and to composite films adhered using the aforementioned adhesive.

主权项

1. A polyurethane-based laminating adhesive composition, comprising
an isocyanate functional component; an isocyanate reactive component; and 5 to 50 wt %, relative to the total weight of the laminating adhesive composition, of at least one solid particulate filler, wherein,
i) at least 90% of the filler particles of the at least one solid particulate filler have a particle size of 4 μm or less, andii) the at least one solid particulate filler has a Mohs hardness of 3 or less.